CVE-2022-43973 - CVE House

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Status published High CVE-2022-43973

Arbitrary code execution in Linksys WRT54GL

7.2 CVSS

Vulnerability Description

An arbitrary code execution vulnerability exisits in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. The Check_TSSI function within the httpd binary uses unvalidated user input in the construction of a system command. An authenticated attacker with administrator privileges can leverage this vulnerability over the network via a malicious POST request to /apply.cgi to execute arbitrary commands on the underlying Linux operating system as root.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Jessie Chick of Trellix ARC

References

More from Linksys

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Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 upload.cgi cgiMain os command injection

Linksys E1700 systemCommand os command injection

Linksys E1700 QoSSetup stack-based overflow

Linksys E1700 setSysAdm stack-based overflow

Linksys E1700 setWan stack-based overflow

Affected Vendor

Linksys

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Affected Software

WRT54GL Wireless-G Broadband Router

Vulnerable Versions:

Firmware

Timeline

Official Publish: January 9th, 2023

Last Modified: April 9th, 2025

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1059 Command and Scripting Interpreter

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1005 Data from Local System

T1041 Exfiltration Over C2 Channel